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Ahelp: pix_gac_to_gdp − CIAO 3.4
URL: http://cxc.harvard.edu/ciao3.4/pix_gac_to_gdp.html
Last modified: December 2006
AHELP for CIAO 3.4
pix_gac_to_gdp
Context: pixlib
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Synopsis
Convert from the Grating diffracted Angular coordinates (GAC) to Grating Dispersion Plane (GDP)
coordinate system.
Syntax
Array_Type pix_gac_to_gdp( Double_Type x, Double_Type y )
Description
This routine converts a position in the Grating diffracted Angular Coordinate (GAC) system to the matching
position in the Grating Dispersion Plane (GDP) coordinate system, using the current settings of the pixlib
module. The x value gives the grating dispersion and the y value the cross−dispersion coordinate, both given
in degrees. The return value is a two−element array which gives the GDP coordinates in pixels.
Bugs
See the bugs page for the pixlib library on the CIAO website for an up−to−date listing of known bugs.
See Also
modules
pixlib
pixlib
pix_gdp_to_gac, pix_get_energy, pix_get_grating_wavelength
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Smithsonian Astrophysical Observatory.
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pix_gac_to_gdp
URL:
http://cxc.harvard.edu/ciao3.4/pix_gac_to_gdp.html
Last modified: December 2006
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Ahelp: pix_gac_to_gdp − CIAO 3.4
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pix_gac_to_gdp